Classifying People on the Basis of Race Alone Is Difficult

Multiple Choice

Classifying people on the basis of race alone is difficult and probably inconclusive in terms of intelligence based on the fact that

A) people of different races interbreed.
B) skin pigmentation is uncorrelated with many psychological and physical traits.
C) so many environmental factors affect people's physical and intellectual abilities.
D) all of the above
E) none of the above